package util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.hibernate.SessionFactory;

public class ConexaoHibernateFilter implements Filter {
	
	private SessionFactory sessionFactory;

	@Override
	public void destroy() {
		
	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain filter) throws IOException, ServletException {
				
		try {
			this.sessionFactory.getCurrentSession().beginTransaction();
			filter.doFilter(req, res);
			this.sessionFactory.getCurrentSession().getTransaction().commit();
			this.sessionFactory.getCurrentSession().close();
		} catch (Throwable t) {
			try {
				if(this.sessionFactory.getCurrentSession().getTransaction().isActive()){
					this.sessionFactory.getCurrentSession().getTransaction().rollback();
				}	
			} catch (Throwable e) {
				e.printStackTrace();
			}
			
			throw new ServletException();
			
		}

	}

	@Override
	public void init(FilterConfig filter) throws ServletException {
		this.sessionFactory = HibernateUtil.getSession();
	}

}
